How do I reset the onboard computer in my Audi 80?

I recently bought a used Audi 80 and there seems to be some issues with the onboard computer. The previous owner didn't reset the computer before selling it. How can I reset it?

To reset the onboard computer in an Audi 80, you will need to follow a few simple steps. First, locate the switch for the ON/OFF position of the ignition key. Then, start the vehicle and let it idle for at least 20 seconds. Finally, turn off the car and remove the key from the ignition. The onboard computer should now be reset and any issues should be resolved.